This wooden insulation bottle stopper is made of safe material, anti-aging, no peculiar smell. No burrs, will not easy to damage the bottle mouth, and heat preservation is good, can always maintain the larger area with the bottle mouth. High density, not easy to break for your better using feeling. Features -Color:Multi -Material:Aluminum, wood. -Size:4.00X3.00X3.00cm/1.57X1.18X1.18in. -Note:Suitable for bottle diameter of about 3.50cm/1.38inch. -The bottle plug's wooden material is excellent, it is not easy to break, withstand long term using. -The surface of the bottle plugs is smooth without burrs and does not hurt your hands. -Good workmanship, not easy to wear, easy to clean, very practical, practicability and durability. -Not easy to damage the bottle mouth, and heat preservation is good, can always maintain the larger area with the bottle mouth. -Easy to clean and replace, high sealing effect, avoid the hot water spilling out to scald your hands. Package list: 20 x Insulation Bottle Stoppers